Customer Persona Builder
Build detailed, data-driven customer personas that make your marketing and product decisions sharper.
Stop building what nobody wants. This interview script uncovers genuine customer problems, not polite validation.
You are a customer research expert trained in the 'Mom Test' methodology — the art of asking questions that even your mom can't give you a fake positive answer to. Design a customer discovery interview script. What I'm building/exploring: [YOUR PRODUCT OR IDEA] Target customer: [WHO YOU WANT TO INTERVIEW] Stage: [HAVEN'T BUILT ANYTHING / HAVE AN MVP / HAVE PAYING CUSTOMERS] Key hypothesis to test: [WHAT DO YOU BELIEVE ABOUT YOUR CUSTOMER THAT MIGHT BE WRONG?] Create: 1. INTERVIEW STRUCTURE (30 minutes total) - Warm-up (2 min) — Build rapport without biasing - Past behavior (10 min) — What they ACTUALLY DID, not what they WOULD DO - Pain exploration (10 min) — Dig into the real problem - Current solutions (5 min) — How they solve it today - Wrap-up (3 min) — Next steps without being salesy 2. KILLER QUESTIONS (15-20 questions) — Each with: - The question itself - WHY you're asking it - RED FLAG answers (signals the problem isn't real) - GREEN FLAG answers (signals genuine pain) 3. ANTI-PATTERNS — Questions to NEVER ask with better versions 4. SIGNAL TRACKER — Scorecard for after each interview 5. SYNTHESIS TEMPLATE — After 10 interviews, how to identify patterns and decide.
KILLER QUESTION: 'Tell me about the last time you tried to [solve this problem]. Walk me through what happened.' WHY: Past behavior is the best predictor. 🟢 GREEN: 'Last Tuesday I spent 3 hours...' (specific, emotional, recent) 🔴 RED: 'Oh, sometimes I might...' (vague, hypothetical) ANTI-PATTERN: ❌ 'Would you use an app that does X?' ✅ 'How are you solving X today? What's the most annoying part?'
This prompt applies Mom Test principles — generating questions that extract truthful behavioral data rather than polite opinions. By focusing on past actions and specific scenarios instead of hypothetical willingness-to-pay, it produces insights you can actually build on.
Use before building any new feature or product, when your assumptions about customer needs haven't been validated with real conversations, or when you're stuck between two product directions and need customer evidence to decide. Essential for pre-PMF startups burning runway on assumptions.
You receive 15-20 interview questions organized by topic (current behavior, pain points, existing solutions, decision criteria) plus follow-up probes, a discussion guide with timing, note-taking template, and a synthesis framework for identifying patterns across 5-10 interviews.
Build detailed, data-driven customer personas that make your marketing and product decisions sharper.
Build a hyper-detailed customer profile that makes your marketing feel like mind-reading.
Run your startup idea through a rigorous validation framework before spending months building it.
Generate a comprehensive product launch checklist covering every phase from pre-launch to post-launch analysis.
Systematically diagnose customer churn, identify warning signs, and build a retention playbook.